Function define

define varName value
define functionName formalArgs body

Creates a variable in the current context.

Parameters:

varName - Symbol identifying the variable to be created in the current context.

value - The object for wich the variable will hold a reference.

functionName - Symbol identifying the function to be created in the current context.

formalArgs - List of symbols representing the function formal arguments, or a symbol representing the list of formal arguments.

body - Code block object that will be used as the new function body.

Returns:

The contents of the variable, that is, a reference to the value object. In the second case it returns a reference to the function object.

Example of defining a numeric variable:

    define pi 3.141516

Example of defining a square function:

    define square ( x ) { * $x $x }

Example of defining a function which accepts a variable number of arguments:

    define lineEcho argList {
        foreach arg $argList {
            echo $arg
        }
    }

Defining the same variable more than once in the same context is legal. Subsequent definitions only change its value, like performed by the function set!.